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I am trying to get my program to print out "banana" from the dictionary. What would be the simplest way to do this?
This is my dictionary:
prices = { "banana" : 4, "apple" : 2, "orange" : 1.5, "pear" : 3 } 
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In Python, there are a few different ways we can get the first key/value pair of a dictionary. The easiest way is to use the items() function, convert it to a list, and access the first element. If you only care about getting the first value of a dictionary, you can use the dictionary values() function.
To simply check if a key exists in a Python dictionary you can use the in operator to search through the dictionary keys like this: pets = {'cats': 1, 'dogs': 2, 'fish': 3} if 'dogs' in pets: print('Dogs found!') # Dogs found! A dictionary can be a convenient data structure for counting the occurrence of items.
As of Python 3.6, for the CPython implementation of Python, dictionaries maintain insertion order by default.
On a Python version where dicts actually are ordered, you can do
my_dict = {'foo': 'bar', 'spam': 'eggs'} next(iter(my_dict)) # outputs 'foo' For dicts to be ordered, you need Python 3.7+, or 3.6+ if you're okay with relying on the technically-an-implementation-detail ordered nature of dicts on Python 3.6.
For earlier Python versions, there is no "first key", but this will give you "a key", especially useful if there is only one.
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